var Url = {
    // public method for url encoding  
    encode: function(string){
        return escape(this._utf8_encode(string));
    },
    // public method for url decoding  
    decode: function(string){
        return this._utf8_decode(unescape(string));
    },
    // private method for UTF-8 encoding  
    _utf8_encode: function(string){
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";
        for (var n = 0; n < string.length; n++) {
            var c = string.charCodeAt(n);
            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else 
                if ((c > 127) && (c < 2048)) {
                    utftext += String.fromCharCode((c >> 6) | 192);
                    utftext += String.fromCharCode((c & 63) | 128);
                }
                else {
                    utftext += String.fromCharCode((c >> 12) | 224);
                    utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                    utftext += String.fromCharCode((c & 63) | 128);
                }
        }
        return utftext;
    },
    // private method for UTF-8 decoding  
    _utf8_decode: function(utftext){
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;
        
        while (i < utftext.length) {
        
            c = utftext.charCodeAt(i);
            
            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else 
                if ((c > 191) && (c < 224)) {
                    c2 = utftext.charCodeAt(i + 1);
                    string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                    i += 2;
                }
                else {
                    c2 = utftext.charCodeAt(i + 1);
                    c3 = utftext.charCodeAt(i + 2);
                    string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                    i += 3;
                }
        }
        return string;
    }
}